By STEVEN ZEITCHIK, CAROL J. WILLIAMS Los Angeles Times July 28, 2014 Ukrainian government forces recaptured three towns from pro-Russia separatists and were pressing toward the Malaysia Airlines crash site in eastern Ukraine where the separatists accused of downing the plane have obstructed international disaster investigators, officials said Monday. The United Nations high commissioner for human rights, meanwhile, said at a news conference in Geneva that the shooting down of MH-17 and the deaths of all 298 people on board were being investigated for possible war-crime charges. Pro-Russia militants who seized a dozen towns and cities in eastern Ukraine in March and April have seen the territory under their control reduced by more than half during the past few weeks and are now holed up in their embattled strongholds of Donetsk and Luhansk. The separatists also control the...